第三方库正则表达式:用法http://see.xidian.edu.cn/cpp/html/1435.html
//邮箱验证
- (BOOL)isValidateEmail:(NSString *)email
{
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",emailRegex];
return [emailTest evaluateWithObject:email];
}
//用户名
- (BOOL)validateUserName:(NSString *)name
{
NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$";
NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex];
BOOL B = [userNamePredicate evaluateWithObject:name];
return B;
}
//昵称
- (BOOL)validateNickname:(NSString *)nickname
{
NSString *nicknameRegex = @"^[/u4e00-/u9fa5]{4,8}$";
NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",nicknameRegex];
return [passWordPredicate evaluateWithObject:nickname];
}
//密码
-(BOOL)validatePassword:(NSString *)passWord
{
NSString *passWordRegex = @"^[a-zA-Z0-9]{6,20}+$";
NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex];
return [passWordPredicate evaluateWithObject:passWord];
}
//身份证号
- (BOOL)validateIdentityCard:(NSString *)identityCard
{
BOOL flag;
if (identityCard.length <= 0) {
flag = NO;
return flag;
}
NSString *regex2 = @"^(//d{14}|//d{17})(//d|[xX])$";
NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2];
return [identityCardPredicate evaluateWithObject:identityCard];
}
//手机号码验证
- (BOOL)validateMobile:(NSString *)mobile
{
//手机号以13， 15，18开头，八个 /d 数字字符
NSString *phoneRegex = @"^((13[0-9])|(15[^4,//D])|(18[0,0-9]))//d{8}$";
NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];
return [phoneTest evaluateWithObject:mobile];
}
//车牌号验证
- (BOOL)validateCarNo:(NSString *)carNo
{
NSString *carRegex = @"^[/u4e00-/u9fa5]{1}[a-zA-Z]{1}[a-zA-Z_0-9]{4}[a-zA-Z_0-9_/u4e00-/u9fa5]$";
NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",carRegex];
NSLog(@"carTest is %@",carTest);
return [carTest evaluateWithObject:carNo];
}
//车型
- (BOOL)validateCarType:(NSString *)CarType
{
NSString *CarTypeRegex = @"^[/u4E00-/u9FFF]+$";
NSPredicate *carTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",CarTypeRegex];
return [carTest evaluateWithObject:CarType];
}
//网址
- (BOOL)validateUrlString:(NSString *)urlString
{
NSString *urlStringRegex = @"^([a-zA-Z]+://)?([\w-\.]+)(\.[a-zA-Z0-9]+)(:\d{0,5})?/?([\w-/]*)\.?([a-zA-Z]*)\??(([\w-]*=[\w%]*&?)*)$";
NSPredicate *urlStringPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",urlStringRegex];
return [urlStringPredicate evaluateWithObject:urlString];
}
1.利用NSPredicate（谓词）匹配
例如匹配有效邮箱：
NSString ＊email ＝ @“nijino_saki@163.com”；
NSString *regex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
BOOLisValid = [predicate evaluateWithObject:email];
谓词匹配比较灵活，但是需要有谓词的相关知识。
2.利用rangeOfString：option：直接查找
NSString *searchText = @"// Do any additional setup after loading the view,typically from a nib.";
NSRange range = [searchText rangeOfString:@"(?:[^,])*\\." options:NSRegularExpressionSearch];
if (range.location != NSNotFound) {
NSLog(@"%@",[searchText substringWithRange:range]);
}
options中设定NSRegularExpressionSearch就是表示利用正则表达式匹配，会返回第一个匹配结果的位置。
3.使用正则表达式类
NSString *searchText = @"// Do any additional setup after loading the view,typically from a nib.";
NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(?:[^,])*\\." options:NSRegularExpressionCaseInsensitive error:&error];
NSTextCheckingResult *result = [regex firstMatchInString:searchText options:0 range:NSMakeRange(0,[searchText length])];
if (result) {
NSLog(@"%@\n",[searchText substringWithRange:result.range]);
}
使用系统的正则表达式类（NSRegularExpression）会返回匹配的多个结果。
\[(\S*?)\]
#define FACE_ICON_NAME \[(\S*?)\]
原文链接：https://www.f2er.com/regex/361717.html